to upgrade my camera kit zoom lens (classified by DXO Labs as poor)with the better 2.8G Nikon Nikkor zoom lenses available never reaches up a classification as good as with a top DSLR Nikon camera.So, if i am to invest in these lenses should i upgrade my camera?

The D60 will not auto-focus with non-AF-S lenses, if I recall correctly, though you can manually focus. The D60 will not meter light with many older Nikon manual-focus lenses, such as pre-AI, AI, and AI-S lenses, though it is possible to meter light by another means, such as a light meter, and shoot in manual mode. These two situations may not affect you, in which case your D60 may be a very useful camera. I will defer to the more experienced digital Nikon shooters to provide more specific information and recommendations. (My Nikons use film.) This being a weekend, many photographers are shooting, rather than being on the internet, so I elected to provide this limited reply.

Moreover, DXO measures lens performance in a technical way, but photography need not be technical. A photographer may favor a lens that is technically poor, for its artistic qualities, or for convenience. Few kit zoom lenses are technically superior, but may balance the equation by being compact, relatively light in weight, and convenient.

Thank you all for the replies.Yes, i´ve been happy with the D60 but i am wondering about my kit lens.What i am really thinking is to upgrade first to the 24-70mm 2.8g Nikon Zoom.Will i really gain something with this move now or is this lens too much for the D60 to handleand i better spare some more money and buy it when i am ready to purchase a better camera?

I bought a 18-200 for my D40x, the model before yours and was ecstatic with the IQ over my kit lenses, like the D60 the lens had to be AF S for autofocus on the D40. Have a look at the lens reviews on the forum. Not sure why anyone would buy a non autofocus nowadays.

The Nikon AF-S 24-70/2.8G Zoom is an excellent lens (my review pending) and will last up to a D800 body. And good glass is always more important than a better body.But why not consider upgrading to a D5100? It has the same great sensor than as the excellent D7000 and shouldn't cost you an arm and a leg. But it can only AF with AF-S lenses.

Thank you again for your replies.Yes, i´ve thought before of the 18-200mm because of the inconvenience of changing lens but i ended thinking that i wouldn´t gain much more than that because they are more or less comparable to the kit lens in terms of aperture range. Am I wrong about it? Is it really a much better lens?I would say in DX, i have been quite satisfied to be able to shoot from 18 to 200mm.On the other end, when i say upgrade i really mean to upgrade right up to the new FX D800 but i can only make that happen more to the end of this year.

Aiming for a D800 later leaves only three option really: 24-70/2.8, 24-120/4.0 VR or 28-300 VR.Of that the 24-70 has the best IQ, followed by the 24-120 and then the 28-300.Btw. initial impressions of the 28-300 on my D800 have not been too bad. But perhaps the 24-120/4.0 VR is the best compromise in IQ and reach/range. Plus it is stabilized.